Network Security Engineer

Posted 1 day ago Top Secret/SCI Senior Level Career (10+ yrs experience) $230,000 - $290,000 IT - Networking Washing, DC (On/Off-Site) As a Sr. Network Security Engineer III, you'll provide hands-on expertise securing mission-critical networks for a high-visibility customer with the goal of making an impact across the federal government. Our team is responsible for designing, operating, and hardening complex security environments, and you'll play a critical role in strengthening, scaling, and protecting these environments while enabling secure mission delivery across the organization. If you think you can see yourself delivering our mission and pursuing our goals with us, then check out the job description below! What you'll do: Design, implement, and manage firewalls, VPNs, IPS, and NAC solutions in mission-critical environments Secure network perimeters and internal network segments using defense-in-depth strategies Respond rapidly to security incidents, vulnerabilities, and operational needs with urgency and discipline Support continuous security hardening and improvement of network infrastructure Participate in Agile execution, technical planning, and security risk discussions Communicate security impacts, risks, and mitigation strategies clearly to technical and non-technical stakeholders Recommend and implement security architecture and operational improvements Serve as a hands-on technical SME, contributing immediately with minimal ramp-up Establish and maintain a high level of customer trust and confidence through reliable, secure delivery Apply creativity and engineering judgment to deliver practical, mission-focused security solutions Demonstrated subject matter expertise designing, implementing, and managing next-generation firewalls, VPN solutions, intrusion prevention systems, and network access control platforms. Hands-on experience securing network perimeters and internal network segments, including policy design, segmentation, and threat mitigation. Operational experience deploying and managing firewall rule sets, VPN tunnels, and security policies in mission-critical environments. Hands-on experience with at least one enterprise security platform, such as Palo Alto Networks, Fortinet, or Cisco security technologies. Hands-on experience with Cisco ISE and Cisco ASA environments. Hands-on experience with IDS and IPS solutions and endpoint configuration hardening in secure environments. Experience supporting Zero Trust architectures and identity-centric network security patterns. Ability to contribute immediately with minimal ramp-up in a mission-critical operational environment. What you'll need to succeed: Active Top Secret security clearance with SCI eligibility required. Required technical certifications include Security+ and at least one platform-specific security certification, such as PCNSE, Fortinet NSE, or a Cisco security certification. Possess DoD 8140 certification aligned to the 441 Network Operations Specialist work role, such as Network+, Security+, Cloud+, SSCP, CASP+, CISSP, or CCNP Security. 10+ years of experience in network engineering with a primary focus on enterprise network security infrastructure. Demonstrated subject matter expertise designing, implementing, and managing next-generation firewalls, VPN solutions, intrusion prevention systems, and network access control platforms. Hands-on experience securing network perimeters and internal network segments, including policy design, segmentation, and threat mitigation. Operational experience deploying and managing firewall rule sets, VPN tunnels, and security policies in mission-critical environments. Hands-on experience with at least one enterprise security platform, such as Palo Alto Networks, Fortinet, or Cisco security technologies. Hands-on experience with Cisco ISE and Cisco ASA environments. Hands-on experience with IDS and IPS solutions and endpoint configuration hardening in secure environments. Experience supporting Zero Trust architectures and identity-centric network security patterns. Bachelor's degree in a technical field is preferred. Relevant experience may substitute for education requirements. Ability to contribute immediately with minimal ramp-up in a mission-critical operational environment.

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